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Microbes in Human Welfare · Question 78

AIPMT 2000MCQEasy📈 Topic in 75% papers+4−1
1

Which of the following is used to manufacture ethanol from starch?

  1. Saccharomyces
  2. Lactobacillus
  3. Azotobacter
  4. Penicillium

Answer

(1) Saccharomyces

Solution

As per NCERT, the yeast Saccharomyces cerevisiae (brewer's yeast) is used for fermenting malted cereals and fruit juices to produce ethanol.

⇒ Starch is first hydrolysed to sugars, which the yeast ferments to ethanol and CO2.

∴ Lactobacillus gives lactic acid, Azotobacter fixes nitrogen and Penicillium gives penicillin.

Answer: (1)

AIPMT 2000

Keep practising — Microbes in Human Welfare

2

What is the reason behind production of large holes in 'Swiss Cheese' ?

  1. The production of large amount of CO2 and H2 by Trichoderma polysporum
  2. The production of large amount of CO2 and H2 by lactic acid bacteria called Lactobacillus
  3. The production of large amount of CO2 by Propionibacterium sharmanii
  4. The production of large amount of CO2 by Clostridium butylicum
NEET (UG) 2026
3

Match List I with List II :

  1. A-II, B-III, C-I, D-IV
  2. A-III, B-II, C-IV, D-I
  3. A-II, B-III, C-IV, D-I
  4. A-IV, B-III, C-II, D-I
NEET (UG) 2026
4

Which of the following is used as a clot buster?

  1. Statins
  2. Streptokinase
  3. Penicillin
  4. Cyclosporin A
RE-NEET (UG) 2026
5

Which of the following is an example of non-distilled alcoholic beverage produced by yeast?

  1. Beer
  2. Rum
  3. Whisky
  4. Brandy
NEET (UG) 2025
6

Which of the following organisms cannot fix nitrogen? Choose the correct answer from the options given below:

  1. B only
  2. E only
  3. A only
  4. D only
NEET (UG) 2025
7

Streptokinase produced by bacterium Streptococcus is used for

  1. Liver disease treatment
  2. Removing clots from blood vessels
  3. Curd production
  4. Ethanol production
NEET (UG) 2025
8

Which of the following microbes is NOT involved in the preparation of household products? Choose the correct answer from the options given below:

  1. C and D only
  2. C and E only
  3. A and B only
  4. A and C only
NEET (UG) 2025
9

Match List I with List II Choose the correct answer from the options given below:

  1. A-III, B-I, C-II, D-IV
  2. A-II, B-IV, C-III, D-I
  3. A-III, B-I, C-IV, D-II
  4. A-IV, B-I, C-III, D-II
NEET (UG) 2024
10

Match List-I with List-II relating to microbes and their products: Choose the correct answer from the options given below:

  1. A-II, B-III, C-IV, D-I
  2. A-I, B-II, C-III, D-IV
  3. A-I, B-III, C-II, D-IV
  4. A-I, B-IV, C-II, D-III
RE-NEET (UG) 2024
11

Identify the microorganism which is responsible for the production of an immunosuppressive molecule cyclosporin A :

  1. Trichoderma polysporum
  2. Clostridium butylicum
  3. Aspergillus niger
  4. Streptococcus cerevisiae
NEET (UG) 2022

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